In large bowl, beat eggs, vanilla bean paste and salt until frothy. Add yams; mash until no lumps remain. Add pineapple, granulated sugar, coconut milk and 1/3 cup of the butter; mix well. Spoon into baking dish. In small bowl, mix coconut, brown sugar, pecans, flour and remaining 1/3 cup butter. Sprinkle evenly over casserole.